Sharpening device



Nov. 3 1925.

C. GEARINGER SHARPENING DEVICE Filed Feb, 27, 1925 5 Sheets-Sheet 1 Y @mwf l Nov. 3l 1925- 1560348 c. GEARINGER SHARPEM'NG DEVICE Filed Feb. 27, 1923 5 Sheets-Sheet 2 Ngv. 3, 1925. Y 1,560,348

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Nov. 3 A 1925.

C. GEARI NGER SHARPENING DEVICE Filed Feb. 27, 1925 5 Sheets-Sheet 5 Patented Nov. 3, 1925.

UNITED STATES laurea PATENT OFFICE.

CHARLES GEARINGER, OF BLOOMSBURG, PlEllNN'SYLVANIA,` ASSIGNOR TO THE MAGEE CARPET COMPANY, F BLOOMSBURG, PENNSYLVANIA, A CORPQRATION OF PENN- SYLVANIA. i

SHARPENING DEVICE.

Application mea February 27, 192s.- `serial No. 621,604..

To all whom t may concern.'

Be it known that I, CHARLES GEARINGER, a citizen of the United Sta-tes, residing in Bloomsburg, Pennsylvania, have invented a Sharpening Device, of which the following is a specification.

In the manufacture of certain pile carpets it is customary to weave the fabric upon a series of parallel wires each having at one end a projecting knife blade and thereafter successively withdrawing these wires longitudinally out of the fabric so thatsaid blades thereon cut the loops of thread which have been laid over the wire, thus forming a pile. Under ordinary conditions, each wire after being used in the weaving of about eleveninches of carpet, has its blade so dulled as to require sharpening and as a consequence looms usingpile wires of the above type require anattendant whose duty is to continually sharpen the edges of the pile wire knives as long as the machine operates.

One object of the present invention is to provide an attachment for a carpet or similar loom for weaving pile fabric, which shall include means for automatically sharpening the pile wire knives during the operation of the machine; the invention especially contemplating a simple and substantial device which may be easily applied and which shall require a minimum of attcntion under conditions of use.

A further object of my invention is to -provide a device for automatically grinding the cutting edges of the knives of pile wires while the latter are firmly held in the fabric which has been woven around them, the arrangement being such that each knife blade will be ground to substantially the saine extent with the result that the fabric produced has a pile of 4uniform length and appearance.

These objects and other advantageous ends I attain as hereinafter set forth, reference being had-to accompanying drawings, in which, f

Fig. 1 is aside elevation, to so1ne..extent diagrammatic, illustrating` one form of my 0 invention as applied to `a loom;

Fig. 2 is a plan, Ion Va larger scale Ythan Fig. 1,., furtlier` illustrating my invention;

Fig. 3 isa front ,elevation of the kgrinding stone and certain of theassociated" parts 3 Fig. 4 is a side elevation of the parts shown in Fig. 3;

Fig; 5, isa vertical section lon the line Fig. 53;

Fig. G is a fragment-ary side elevation of the knife blade end of a pile wire showingl the grinding stone in position to cooperate therewith. i

In Figs. l to 6 of the above drawings l represents the lay of a loom which is mounted to oscillate with or upon a shaft 2. The warp aff-yi after passing through the reed 3, is (woven upon a series of pile wires l and from thence the finished fabric :c passes around a guide roller to a beam G on which it is wound. The pile wires, as shown in Figs. 2 and 6, each have one endformed to constitute a thin cutting blade 7 supported in a vertical plane on a suitable supporting table S. The free extremity of each blade is preferably given a slight lateral curve as indicated at 9 audit will be understood that the sharpened or cutting edge of the blade lies uppermost, so that as the wires are drawn out of the fabric m-by the action of the pilek wire `carriage and its associated mechanism (not shown), certain of the warp threads are cut to form the `pile of the fabric.

Figs. 7 and 8 respectively a side and a front elevation, the` first partly in section, illulstrating a modification of my invention; anc i y Figs. 9 and 10 are respectively a side and an edge elevation of one lof the grindingwheels used in that form yof the invention shown in Figs. 7 and 8.

In accordance with my invention and for the purpose of sharpeningthe edges of the blades 7, I mount an arm 10 on aporton 1l of the loom. frame 1 0n that side thereof adjacent therknife bladeends of thepile wires. This arm extends upwardly and has rigidly fastened'to. it aflaterally projecting rodor spindle 1261i whichis rotatably mounted an elongated'sleeve 13.1 This sleeve has fixed toit a suitably grooved or flanged pulley y141 nd also a `'projecting arm lfheld in place by a set screw 16.

wuitably mounted on thefree or outer end of the arm 'is an elongated grinding stone of suitable abrasivematerial tapering toward its end` andHVshaped 1n cross section,

said "stone in the present instance being adjustably clamped in a recess in the end of the arm by a retaining plate .17 held in place by screws 17a. The sleeve 13 is held longitudinally in place upon the spindle 12 between aflange or collar 18 thereon `and a cotter pin or equivalent device 19 and said spindle may be adjusted parallel with itself to project at various distances above the'pile wires, by moving it up or down in a slot 20 formed in the arm 10, it being possible to clamp it any adjusted position by tightening a retaining nut 21.

The various parts are of sucli dimensions and ai'e so adjusted that rotation' of the sleeve 13 will swing the grinding stone 22 downwardly between and in engagement with two blades of a pair of adjacent pile wires which are more or less firmly held in the fabric the tapered sides of said stone being so formed as to properly contact with and in its movement to sharpen the cutting edges of said blades, as shown in Fig. G.

For periodically and automatically oscillating the sleeve 13 so as to actuate the grinding stone as above described I mount on the shaft 2 of the lay a project-ing arm 23 and extend a. flexible cable or belt 24 from lthis arm upwardly around the pulley 14 and then downto one end of a` spring 25 whose opposite end is lfixed to the lfloor or some other Iixed'structure, the arrangement being 'suoli as to at all times maintain said belt in a taut Condition. 4

Tith the above described arrangement of parts it is obvious that each time the lay moves toward the right in beating up the weft, the grinding stone 22 is swung downwardly between the blades of a pair of adjacent pile wires so that its inclined side or sides comes into abrasive engagement with either or both of the cutting edges of said blades. Its action is suoli as to at all times maintain said cutting edges in a sharpened condition best fitted to perfectly cut the threads woven over their wires when the llatter are forcibly withdrawn from the fabric. As the layswings toward the left, the spring 25 acts to so turn the sleeve 13 as to raise the grinding stone to the elevated position shown in Fig. l, and as the operation of the loom causes the pile 'wires el to be successively moved toward the right, each downward swing of th'e grinding stone 'causes it vto enter vbetween anew pair of wires and sharpen another wire blade.

As a resultof the above described operation, the cutting edges of the series of pile 'wires are all acted on to substantially the saine extent by the grinding stone "so that they are worn away uniformly .and in lcutting the threads of the 'fab-ric 'make a 4pile whose threads are uniform in length and appearance. 'The-device is er such mature that it willoperate for long periods of time without 'requiring little if any attention,

although it is obvious that if desired the position of the grinding stone Ymayv beadjusted in its holder so that it will at all times properly engage the edges of the pile wire blades.y f A lVithout departing Afrom -niy invention, I may provide a device other than that shown in Figs. L1 to 6 inclusive, for automatically maintaining the cutting blades of the pile wires at all times in a sharpened condition. For example, in place of the reciprocating sharpening stone, I may utilize one or more rotary grinding wheels in the manner ind i= cated in Figs. 7 to r10 inclusive. For this purpose, I mount a cam 26 and a pulley 27,

on a rotary shaft 25 connecting said pulley through a belt 28 with a second pulley 29 fixed to a sleeve 30 rotatably carried on a fixed spindle 31 adjacent one end thereof. Said spindle is mounted in and projects horizontally at right angles vto a lever 32 fulcrumed on a bolt 33 carried by a portion 34 of the frame of the loom. At its lower end said lever has mounted on it a suitable roller 35 positioned to cooperate with the cam 2G so that yas the shaft 25 is turned by power applied through a gear wheel 37, the lever 32 is caused to oscillate on its pivot or fulcrum 33.

Said lever is so mounted ythat the spindle 31 and hence lthe sleeve 30 projects immediately over and at right angles to the blades '7 of the pile wires at, andon the spindle I mount one or more grinding wheels 38 each of which has a hub 39 slidably fitting on said sleeve 30, which it will be noted, is square in cross section. yOn the outer or free end of the sleeve, :distant from 'the vpulley 29, is fixed an abutment in the shape of a nut 40 against which the vgrinding` wheels are at all times yieldingly pressed b coiled springfll operative on the sleeve ietween them and the pulley 29.y

The grinding Awheels are preferably sharply beveled toward their edges and each ofthem has a'portion cutaway beyond a'. line parallel with the diameter, so that when. said wheels are so positioned that the straight portion 42 vof their edge is substantially horizontal, tlie pile wires may be moved bodily without interference from said wheels. Under conditions :of operation, the shaft 25 is continuously or 'intermittently turned as may be desired, so that the sleeve :30 and wheels 38 are likewise turned.

parts are so adjusted, however, that while the pile wires are being moved bodily with the fabric as this is moved during lthe 'take up, 'the wheels occupy the relative lpositions indicated in Fig. -91soitha`t they do not in-'terfere with suoli 4motion of the .pi-le wires.

VWhen, howevei, the latter are "-iminovably held bv 'the fabric, tliefrotation of the s'piiiedges engage the upwardly projecting cutting edges of the pile Wire blades. At the same time the spindle 31 and with it the Wheels S8 thereon are swung bodily by movement of the lever 32 on its ulcrum under the action ot' the cam 26, so that during rotation of the Wheel or Wheels, the latter are iinoved longitudinally of the pile Wire blades. Thereafter and While the straight edged parts of the Wheels are immediately over the pile Wires, the latter are moved bodily with the fabric for a distance equal to the width of one Wire, after which the above described sharpening operation is repeated so that all of the Wires are successively engaged and kept sharpened by the grinding Wheels.

I claim:

1. The combination with a loom having a series of bladed pile wires, of a device automatically movable during the operation of the loom to enter between tivo blades and to sinniltaneously engage both oi' them to sharpen them.

Q. The combination with a loom having a series oit bladed pile Wires, of a device having its major portion located above the blades, the said device being automatically movable downward during the operation of the loom to enter between two blades and to simultaneously engage both of them to sharpen the 3. The combination in a loom having a lay and bladed pile wires of a rotatably mounted spindle; a pulley and an arm on said spindle; a grinding stone carried by said arm; and a beltconnected to the lay and operative upon said pulley to cause the engagement of the grinding stone with the blade oit a pile Wire at each beat of the lay.

1l. The combination in a loom having a lay and bladed pile Wires of a rotatably mounted spindle; an arm and a pulley on said spindle; a. grinding stone carried by said arm; a second arm movable With the lay; a belt having one end connected to said second arm and passing over the pulley; with a spring connected to the other end of said belt.

5. The combination in a loom having bladed pile Wires of an oscillatory arm havinga horizontal axis above the plane of the Wires; an elongated tapered grinding stone projecting downward from said arm; and means for actuating the arm to cause the grinding stone to periodically swing between and sharpen the cutting edges of adjacent pile Wires.

CHARLES GEARINGER. 

